+++ /dev/null
-From bb4781b1dac98688a3cf64cf728a64d811ca6add Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?J=C3=B6rg=20Schambacher?=
- <j-schambacher@users.noreply.github.com>
-Date: Tue, 21 Jan 2020 15:58:39 +0100
-Subject: [PATCH] sound: Add the HiFiBerry DAC+HD version
-
-This adds the driver for the DAC+HD version supporting HiFiBerry's
-PCM179x based DACs. It also adds PLL control for clock generation.
-
-Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
----
- arch/arm/boot/dts/overlays/Makefile | 1 +
- arch/arm/boot/dts/overlays/README | 6 +
- .../overlays/hifiberry-dacplushd-overlay.dts | 106 ++++++
- drivers/clk/Makefile | 1 +
- drivers/clk/clk-hifiberry-dachd.c | 333 ++++++++++++++++++
- sound/soc/bcm/Kconfig | 7 +
- sound/soc/bcm/Makefile | 2 +
- sound/soc/bcm/hifiberry_dacplushd.c | 235 ++++++++++++
- 13 files changed, 696 insertions(+)
- create mode 100644 arch/arm/boot/dts/overlays/hifiberry-dacplushd-overlay.dts
- create mode 100644 drivers/clk/clk-hifiberry-dachd.c
- create mode 100644 sound/soc/bcm/hifiberry_dacplushd.c
-
---- a/arch/arm/boot/dts/overlays/Makefile
-+++ b/arch/arm/boot/dts/overlays/Makefile
-@@ -57,6 +57,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
- hifiberry-dacplusadc.dtbo \
- hifiberry-dacplusadcpro.dtbo \
- hifiberry-dacplusdsp.dtbo \
-+ hifiberry-dacplushd.dtbo \
- hifiberry-digi.dtbo \
- hifiberry-digi-pro.dtbo \
- hy28a.dtbo \
---- a/arch/arm/boot/dts/overlays/README
-+++ b/arch/arm/boot/dts/overlays/README
-@@ -956,6 +956,12 @@ Load: dtoverlay=hifiberry-dacplusdsp
- Params: <None>
-
-
-+Name: hifiberry-dacplushd
-+Info: Configures the HifiBerry DAC+ HD audio card
-+Load: dtoverlay=hifiberry-dacplushd
-+Params: <None>
-+
-+
- Name: hifiberry-digi
- Info: Configures the HifiBerry Digi and Digi+ audio card
- Load: dtoverlay=hifiberry-digi
---- /dev/null
-+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplushd-overlay.dts
-@@ -0,0 +1,106 @@
-+// Definitions for HiFiBerry DAC+ HD
-+/dts-v1/;
-+/plugin/;
-+
-+#include <dt-bindings/gpio/gpio.h>
-+
-+/ {
-+ compatible = "brcm,bcm2835";
-+
-+ fragment@0 {
-+ target-path = "/clocks";
-+ __overlay__ {
-+ dachd_osc: pll_dachd_osc {
-+ compatible = "hifiberry,dachd-clk";
-+ #clock-cells = <0>;
-+ };
-+ };
-+ };
-+
-+ fragment@1 {
-+ target = <&i2s>;
-+ __overlay__ {
-+ status = "okay";
-+ };
-+ };
-+
-+ fragment@2 {
-+ target = <&i2c1>;
-+ __overlay__ {
-+ #address-cells = <1>;
-+ #size-cells = <0>;
-+ status = "okay";
-+
-+ pcm1792a@4c {
-+ compatible = "ti,pcm1792a";
-+ #sound-dai-cells = <0>;
-+ #clock-cells = <0>;
-+ clocks = <&dachd_osc>;
-+ reg = <0x4c>;
-+ status = "okay";
-+ };
-+ pll: pll@62 {
-+ compatible = "hifiberry,dachd-clk";
-+ #clock-cells = <0>;
-+ reg = <0x62>;
-+ clocks = <&dachd_osc>;
-+ status = "okay";
-+ common_pll_regs = [
-+ 02 53 03 00 07 20 0F 00
-+ 10 0D 11 1D 12 0D 13 8C
-+ 14 8C 15 8C 16 8C 17 8C
-+ 18 2A 1C 00 1D 0F 1F 00
-+ 2A 00 2C 00 2F 00 30 00
-+ 31 00 32 00 34 00 37 00
-+ 38 00 39 00 3A 00 3B 01
-+ 3E 00 3F 00 40 00 41 00
-+ 5A 00 5B 00 95 00 96 00
-+ 97 00 98 00 99 00 9A 00
-+ 9B 00 A2 00 A3 00 A4 00
-+ B7 92 ];
-+ 192k_pll_regs = [
-+ 1A 0C 1B 35 1E F0 20 09
-+ 21 50 2B 02 2D 10 2E 40
-+ 33 01 35 22 36 80 3C 22
-+ 3D 46 ];
-+ 96k_pll_regs = [
-+ 1A 0C 1B 35 1E F0 20 09
-+ 21 50 2B 02 2D 10 2E 40
-+ 33 01 35 47 36 00 3C 32
-+ 3D 46 ];
-+ 48k_pll_regs = [
-+ 1A 0C 1B 35 1E F0 20 09
-+ 21 50 2B 02 2D 10 2E 40
-+ 33 01 35 90 36 00 3C 42
-+ 3D 46 ];
-+ 176k4_pll_regs = [
-+ 1A 3D 1B 09 1E F3 20 13
-+ 21 75 2B 04 2D 11 2E E0
-+ 33 02 35 25 36 C0 3C 22
-+ 3D 7A ];
-+ 88k2_pll_regs = [
-+ 1A 3D 1B 09 1E F3 20 13
-+ 21 75 2B 04 2D 11 2E E0
-+ 33 01 35 4D 36 80 3C 32
-+ 3D 7A ];
-+ 44k1_pll_regs = [
-+ 1A 3D 1B 09 1E F3 20 13
-+ 21 75 2B 04 2D 11 2E E0
-+ 33 01 35 9D 36 00 3C 42
-+ 3D 7A ];
-+ };
-+ };
-+ };
-+
-+ fragment@3 {
-+ target = <&sound>;
-+ __overlay__ {
-+ compatible = "hifiberry,hifiberry-dacplushd";
-+ i2s-controller = <&i2s>;
-+ clocks = <&pll 0>;
-+ reset-gpio = <&gpio 16 GPIO_ACTIVE_LOW>;
-+ status = "okay";
-+ };
-+ };
-+
-+};
---- a/drivers/clk/Makefile
-+++ b/drivers/clk/Makefile
-@@ -32,6 +32,7 @@ obj-$(CONFIG_COMMON_CLK_ASPEED) += clk-
- obj-$(CONFIG_ARCH_HIGHBANK) += clk-highbank.o
- obj-$(CONFIG_CLK_HSDK) += clk-hsdk-pll.o
- obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += clk-hifiberry-dacpro.o
-+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSHD) += clk-hifiberry-dachd.o
- obj-$(CONFIG_COMMON_CLK_MAX77686) += clk-max77686.o
- obj-$(CONFIG_COMMON_CLK_MAX9485) += clk-max9485.o
- obj-$(CONFIG_ARCH_MOXART) += clk-moxart.o
---- /dev/null
-+++ b/drivers/clk/clk-hifiberry-dachd.c
-@@ -0,0 +1,333 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * Clock Driver for HiFiBerry DAC+ HD
-+ *
-+ * Author: Joerg Schambacher, i2Audio GmbH for HiFiBerry
-+ * Copyright 2020
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful, but
-+ * WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-+ * General Public License for more details.
-+ */
-+
-+#include <linux/clk-provider.h>
-+#include <linux/clk.h>
-+#include <linux/kernel.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/slab.h>
-+#include <linux/platform_device.h>
-+#include <linux/i2c.h>
-+#include <linux/regmap.h>
-+
-+#define NO_PLL_RESET 0
-+#define PLL_RESET 1
-+#define HIFIBERRY_PLL_MAX_REGISTER 256
-+#define DEFAULT_RATE 44100
-+
-+static struct reg_default hifiberry_pll_reg_defaults[] = {
-+ {0x02, 0x53}, {0x03, 0x00}, {0x07, 0x20}, {0x0F, 0x00},
-+ {0x10, 0x0D}, {0x11, 0x1D}, {0x12, 0x0D}, {0x13, 0x8C},
-+ {0x14, 0x8C}, {0x15, 0x8C}, {0x16, 0x8C}, {0x17, 0x8C},
-+ {0x18, 0x2A}, {0x1C, 0x00}, {0x1D, 0x0F}, {0x1F, 0x00},
-+ {0x2A, 0x00}, {0x2C, 0x00}, {0x2F, 0x00}, {0x30, 0x00},
-+ {0x31, 0x00}, {0x32, 0x00}, {0x34, 0x00}, {0x37, 0x00},
-+ {0x38, 0x00}, {0x39, 0x00}, {0x3A, 0x00}, {0x3B, 0x01},
-+ {0x3E, 0x00}, {0x3F, 0x00}, {0x40, 0x00}, {0x41, 0x00},
-+ {0x5A, 0x00}, {0x5B, 0x00}, {0x95, 0x00}, {0x96, 0x00},
-+ {0x97, 0x00}, {0x98, 0x00}, {0x99, 0x00}, {0x9A, 0x00},
-+ {0x9B, 0x00}, {0xA2, 0x00}, {0xA3, 0x00}, {0xA4, 0x00},
-+ {0xB7, 0x92},
-+ {0x1A, 0x3D}, {0x1B, 0x09}, {0x1E, 0xF3}, {0x20, 0x13},
-+ {0x21, 0x75}, {0x2B, 0x04}, {0x2D, 0x11}, {0x2E, 0xE0},
-+ {0x3D, 0x7A},
-+ {0x35, 0x9D}, {0x36, 0x00}, {0x3C, 0x42},
-+ { 177, 0xAC},
-+};
-+static struct reg_default common_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_common_pll_regs;
-+static struct reg_default dedicated_192k_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_dedicated_192k_pll_regs;
-+static struct reg_default dedicated_96k_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_dedicated_96k_pll_regs;
-+static struct reg_default dedicated_48k_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_dedicated_48k_pll_regs;
-+static struct reg_default dedicated_176k4_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_dedicated_176k4_pll_regs;
-+static struct reg_default dedicated_88k2_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_dedicated_88k2_pll_regs;
-+static struct reg_default dedicated_44k1_pll_regs[HIFIBERRY_PLL_MAX_REGISTER];
-+static int num_dedicated_44k1_pll_regs;
-+
-+/**
-+ * struct clk_hifiberry_drvdata - Common struct to the HiFiBerry DAC HD Clk
-+ * @hw: clk_hw for the common clk framework
-+ */
-+struct clk_hifiberry_drvdata {
-+ struct regmap *regmap;
-+ struct clk *clk;
-+ struct clk_hw hw;
-+ unsigned long rate;
-+};
-+
-+#define to_hifiberry_clk(_hw) \
-+ container_of(_hw, struct clk_hifiberry_drvdata, hw)
-+
-+static int clk_hifiberry_dachd_write_pll_regs(struct regmap *regmap,
-+ struct reg_default *regs,
-+ int num, int do_pll_reset)
-+{
-+ int i;
-+ int ret = 0;
-+ char pll_soft_reset[] = { 177, 0xAC, };
-+
-+ for (i = 0; i < num; i++) {
-+ ret |= regmap_write(regmap, regs[i].reg, regs[i].def);
-+ if (ret)
-+ return ret;
-+ }
-+ if (do_pll_reset) {
-+ ret |= regmap_write(regmap, pll_soft_reset[0],
-+ pll_soft_reset[1]);
-+ mdelay(10);
-+ }
-+ return ret;
-+}
-+
-+static unsigned long clk_hifiberry_dachd_recalc_rate(struct clk_hw *hw,
-+ unsigned long parent_rate)
-+{
-+ return to_hifiberry_clk(hw)->rate;
-+}
-+
-+static long clk_hifiberry_dachd_round_rate(struct clk_hw *hw,
-+ unsigned long rate, unsigned long *parent_rate)
-+{
-+ return rate;
-+}
-+
-+static int clk_hifiberry_dachd_set_rate(struct clk_hw *hw,
-+ unsigned long rate, unsigned long parent_rate)
-+{
-+ int ret;
-+ struct clk_hifiberry_drvdata *drvdata = to_hifiberry_clk(hw);
-+
-+ switch (rate) {
-+ case 44100:
-+ ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
-+ dedicated_44k1_pll_regs, num_dedicated_44k1_pll_regs,
-+ PLL_RESET);
-+ break;
-+ case 88200:
-+ ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
-+ dedicated_88k2_pll_regs, num_dedicated_88k2_pll_regs,
-+ PLL_RESET);
-+ break;
-+ case 176400:
-+ ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
-+ dedicated_176k4_pll_regs, num_dedicated_176k4_pll_regs,
-+ PLL_RESET);
-+ break;
-+ case 48000:
-+ ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
-+ dedicated_48k_pll_regs, num_dedicated_48k_pll_regs,
-+ PLL_RESET);
-+ break;
-+ case 96000:
-+ ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
-+ dedicated_96k_pll_regs, num_dedicated_96k_pll_regs,
-+ PLL_RESET);
-+ break;
-+ case 192000:
-+ ret = clk_hifiberry_dachd_write_pll_regs(drvdata->regmap,
-+ dedicated_192k_pll_regs, num_dedicated_192k_pll_regs,
-+ PLL_RESET);
-+ break;
-+ default:
-+ ret = -EINVAL;
-+ break;
-+ }
-+ to_hifiberry_clk(hw)->rate = rate;
-+
-+ return ret;
-+}
-+
-+const struct clk_ops clk_hifiberry_dachd_rate_ops = {
-+ .recalc_rate = clk_hifiberry_dachd_recalc_rate,
-+ .round_rate = clk_hifiberry_dachd_round_rate,
-+ .set_rate = clk_hifiberry_dachd_set_rate,
-+};
-+
-+static int clk_hifiberry_get_prop_values(struct device *dev,
-+ char *prop_name,
-+ struct reg_default *regs)
-+{
-+ int ret;
-+ int i;
-+ u8 tmp[2 * HIFIBERRY_PLL_MAX_REGISTER];
-+
-+ ret = of_property_read_variable_u8_array(dev->of_node, prop_name,
-+ tmp, 0, 2 * HIFIBERRY_PLL_MAX_REGISTER);
-+ if (ret < 0)
-+ return ret;
-+ if (ret & 1) {
-+ dev_err(dev,
-+ "%s <%s> -> #%i odd number of bytes for reg/val pairs!",
-+ __func__,
-+ prop_name,
-+ ret);
-+ return -EINVAL;
-+ }
-+ ret /= 2;
-+ for (i = 0; i < ret; i++) {
-+ regs[i].reg = (u32)tmp[2 * i];
-+ regs[i].def = (u32)tmp[2 * i + 1];
-+ }
-+ return ret;
-+}
-+
-+
-+static int clk_hifiberry_dachd_dt_parse(struct device *dev)
-+{
-+ num_common_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "common_pll_regs", common_pll_regs);
-+ num_dedicated_44k1_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "44k1_pll_regs", dedicated_44k1_pll_regs);
-+ num_dedicated_88k2_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "88k2_pll_regs", dedicated_88k2_pll_regs);
-+ num_dedicated_176k4_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "176k4_pll_regs", dedicated_176k4_pll_regs);
-+ num_dedicated_48k_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "48k_pll_regs", dedicated_48k_pll_regs);
-+ num_dedicated_96k_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "96k_pll_regs", dedicated_96k_pll_regs);
-+ num_dedicated_192k_pll_regs = clk_hifiberry_get_prop_values(dev,
-+ "192k_pll_regs", dedicated_192k_pll_regs);
-+ return 0;
-+}
-+
-+
-+static int clk_hifiberry_dachd_remove(struct device *dev)
-+{
-+ of_clk_del_provider(dev->of_node);
-+ return 0;
-+}
-+
-+const struct regmap_config hifiberry_pll_regmap = {
-+ .reg_bits = 8,
-+ .val_bits = 8,
-+ .max_register = HIFIBERRY_PLL_MAX_REGISTER,
-+ .reg_defaults = hifiberry_pll_reg_defaults,
-+ .num_reg_defaults = ARRAY_SIZE(hifiberry_pll_reg_defaults),
-+ .cache_type = REGCACHE_RBTREE,
-+};
-+EXPORT_SYMBOL_GPL(hifiberry_pll_regmap);
-+
-+
-+static int clk_hifiberry_dachd_i2c_probe(struct i2c_client *i2c,
-+ const struct i2c_device_id *id)
-+{
-+ struct clk_hifiberry_drvdata *hdclk;
-+ int ret = 0;
-+ struct clk_init_data init;
-+ struct device *dev = &i2c->dev;
-+ struct device_node *dev_node = dev->of_node;
-+ struct regmap_config config = hifiberry_pll_regmap;
-+
-+ hdclk = devm_kzalloc(&i2c->dev,
-+ sizeof(struct clk_hifiberry_drvdata), GFP_KERNEL);
-+ if (!hdclk)
-+ return -ENOMEM;
-+
-+ i2c_set_clientdata(i2c, hdclk);
-+
-+ hdclk->regmap = devm_regmap_init_i2c(i2c, &config);
-+
-+ if (IS_ERR(hdclk->regmap))
-+ return PTR_ERR(hdclk->regmap);
-+
-+ /* start PLL to allow detection of DAC */
-+ ret = clk_hifiberry_dachd_write_pll_regs(hdclk->regmap,
-+ hifiberry_pll_reg_defaults,
-+ ARRAY_SIZE(hifiberry_pll_reg_defaults),
-+ PLL_RESET);
-+ if (ret)
-+ return ret;
-+
-+ clk_hifiberry_dachd_dt_parse(dev);
-+
-+ /* restart PLL with configs from DTB */
-+ ret = clk_hifiberry_dachd_write_pll_regs(hdclk->regmap, common_pll_regs,
-+ num_common_pll_regs, PLL_RESET);
-+ if (ret)
-+ return ret;
-+
-+ init.name = "clk-hifiberry-dachd";
-+ init.ops = &clk_hifiberry_dachd_rate_ops;
-+ init.flags = CLK_IS_BASIC;
-+ init.parent_names = NULL;
-+ init.num_parents = 0;
-+
-+ hdclk->hw.init = &init;
-+
-+ hdclk->clk = devm_clk_register(dev, &hdclk->hw);
-+ if (IS_ERR(hdclk->clk)) {
-+ dev_err(dev, "unable to register %s\n", init.name);
-+ return PTR_ERR(hdclk->clk);
-+ }
-+
-+ ret = of_clk_add_provider(dev_node, of_clk_src_simple_get, hdclk->clk);
-+ if (ret != 0) {
-+ dev_err(dev, "Cannot of_clk_add_provider");
-+ return ret;
-+ }
-+
-+ ret = clk_set_rate(hdclk->hw.clk, DEFAULT_RATE);
-+ if (ret != 0) {
-+ dev_err(dev, "Cannot set rate : %d\n", ret);
-+ return -EINVAL;
-+ }
-+
-+ return ret;
-+}
-+
-+static int clk_hifiberry_dachd_i2c_remove(struct i2c_client *i2c)
-+{
-+ clk_hifiberry_dachd_remove(&i2c->dev);
-+ return 0;
-+}
-+
-+static const struct i2c_device_id clk_hifiberry_dachd_i2c_id[] = {
-+ { "dachd-clk", },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(i2c, clk_hifiberry_dachd_i2c_id);
-+
-+static const struct of_device_id clk_hifiberry_dachd_of_match[] = {
-+ { .compatible = "hifiberry,dachd-clk", },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(of, clk_hifiberry_dachd_of_match);
-+
-+static struct i2c_driver clk_hifiberry_dachd_i2c_driver = {
-+ .probe = clk_hifiberry_dachd_i2c_probe,
-+ .remove = clk_hifiberry_dachd_i2c_remove,
-+ .id_table = clk_hifiberry_dachd_i2c_id,
-+ .driver = {
-+ .name = "dachd-clk",
-+ .of_match_table = of_match_ptr(clk_hifiberry_dachd_of_match),
-+ },
-+};
-+
-+module_i2c_driver(clk_hifiberry_dachd_i2c_driver);
-+
-+
-+MODULE_DESCRIPTION("HiFiBerry DAC+ HD clock driver");
-+MODULE_AUTHOR("Joerg Schambacher <joerg@i2audio.com>");
-+MODULE_LICENSE("GPL v2");
-+MODULE_ALIAS("platform:clk-hifiberry-dachd");
---- a/sound/soc/bcm/Kconfig
-+++ b/sound/soc/bcm/Kconfig
-@@ -40,6 +40,13 @@ config SND_BCM2708_SOC_HIFIBERRY_DACPLUS
- help
- Say Y or M if you want to add support for HifiBerry DAC+.
-
-+config SND_BCM2708_SOC_HIFIBERRY_DACPLUSHD
-+ tristate "Support for HifiBerry DAC+ HD"
-+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
-+ select SND_SOC_PCM179X_I2C
-+ help
-+ Say Y or M if you want to add support for HifiBerry DAC+ HD.
-+
- config SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC
- tristate "Support for HifiBerry DAC+ADC"
- depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
---- a/sound/soc/bcm/Makefile
-+++ b/sound/soc/bcm/Makefile
-@@ -13,6 +13,7 @@ snd-soc-googlevoicehat-codec-objs := goo
-
- # BCM2708 Machine Support
- snd-soc-hifiberry-dacplus-objs := hifiberry_dacplus.o
-+snd-soc-hifiberry-dacplushd-objs := hifiberry_dacplushd.o
- snd-soc-hifiberry-dacplusadc-objs := hifiberry_dacplusadc.o
- snd-soc-hifiberry-dacplusadcpro-objs := hifiberry_dacplusadcpro.o
- snd-soc-hifiberry-dacplusdsp-objs := hifiberry_dacplusdsp.o
-@@ -40,6 +41,7 @@ snd-soc-rpi-wm8804-soundcard-objs := rpi
-
- obj-$(CONFIG_SND_BCM2708_SOC_GOOGLEVOICEHAT_SOUNDCARD) += snd-soc-googlevoicehat-codec.o
- obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUS) += snd-soc-hifiberry-dacplus.o
-+obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSHD) += snd-soc-hifiberry-dacplushd.o
- obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADC) += snd-soc-hifiberry-dacplusadc.o
- obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSADCPRO) += snd-soc-hifiberry-dacplusadcpro.o
- obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DACPLUSDSP) += snd-soc-hifiberry-dacplusdsp.o
---- /dev/null
-+++ b/sound/soc/bcm/hifiberry_dacplushd.c
-@@ -0,0 +1,235 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * ASoC Driver for HiFiBerry DAC+ HD
-+ *
-+ * Author: Joerg Schambacher, i2Audio GmbH for HiFiBerry
-+ * Copyright 2020
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful, but
-+ * WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-+ * General Public License for more details.
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/platform_device.h>
-+#include <linux/kernel.h>
-+#include <linux/delay.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/delay.h>
-+#include <linux/gpio.h>
-+#include <linux/gpio/consumer.h>
-+#include <sound/core.h>
-+#include <sound/pcm.h>
-+#include <sound/pcm_params.h>
-+#include <sound/soc.h>
-+#include <linux/i2c.h>
-+#include <linux/clk.h>
-+
-+#include "../codecs/pcm179x.h"
-+
-+#define DEFAULT_RATE 44100
-+
-+struct brd_drv_data {
-+ struct regmap *regmap;
-+ struct clk *sclk;
-+};
-+
-+static struct brd_drv_data drvdata;
-+static struct gpio_desc *reset_gpio;
-+static const unsigned int hb_dacplushd_rates[] = {
-+ 192000, 96000, 48000, 176400, 88200, 44100,
-+};
-+
-+static struct snd_pcm_hw_constraint_list hb_dacplushd_constraints = {
-+ .list = hb_dacplushd_rates,
-+ .count = ARRAY_SIZE(hb_dacplushd_rates),
-+};
-+
-+static int snd_rpi_hb_dacplushd_startup(struct snd_pcm_substream *substream)
-+{
-+ /* constraints for standard sample rates */
-+ snd_pcm_hw_constraint_list(substream->runtime, 0,
-+ SNDRV_PCM_HW_PARAM_RATE,
-+ &hb_dacplushd_constraints);
-+ return 0;
-+}
-+
-+static void snd_rpi_hifiberry_dacplushd_set_sclk(
-+ struct snd_soc_component *component,
-+ int sample_rate)
-+{
-+ if (!IS_ERR(drvdata.sclk))
-+ clk_set_rate(drvdata.sclk, sample_rate);
-+}
-+
-+static int snd_rpi_hifiberry_dacplushd_init(struct snd_soc_pcm_runtime *rtd)
-+{
-+ struct snd_soc_dai_link *dai = rtd->dai_link;
-+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-+
-+ dai->name = "HiFiBerry DAC+ HD";
-+ dai->stream_name = "HiFiBerry DAC+ HD HiFi";
-+ dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
-+ | SND_SOC_DAIFMT_CBM_CFM;
-+
-+ /* allow only fixed 32 clock counts per channel */
-+ snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2);
-+
-+ return 0;
-+}
-+
-+static int snd_rpi_hifiberry_dacplushd_hw_params(
-+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
-+{
-+ int ret = 0;
-+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
-+
-+ struct snd_soc_component *component = rtd->codec_dai->component;
-+
-+ snd_rpi_hifiberry_dacplushd_set_sclk(component, params_rate(params));
-+ return ret;
-+}
-+
-+/* machine stream operations */
-+static struct snd_soc_ops snd_rpi_hifiberry_dacplushd_ops = {
-+ .startup = snd_rpi_hb_dacplushd_startup,
-+ .hw_params = snd_rpi_hifiberry_dacplushd_hw_params,
-+};
-+
-+static struct snd_soc_dai_link snd_rpi_hifiberry_dacplushd_dai[] = {
-+{
-+ .name = "HiFiBerry DAC+ HD",
-+ .stream_name = "HiFiBerry DAC+ HD HiFi",
-+ .cpu_dai_name = "bcm2708-i2s.0",
-+ .codec_dai_name = "pcm179x-hifi",
-+ .platform_name = "bcm2708-i2s.0",
-+ .codec_name = "pcm179x.1-004c",
-+ .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
-+ SND_SOC_DAIFMT_CBS_CFS,
-+ .ops = &snd_rpi_hifiberry_dacplushd_ops,
-+ .init = snd_rpi_hifiberry_dacplushd_init,
-+},
-+};
-+
-+/* audio machine driver */
-+static struct snd_soc_card snd_rpi_hifiberry_dacplushd = {
-+ .name = "snd_rpi_hifiberry_dacplushd",
-+ .driver_name = "HifiberryDacplusHD",
-+ .owner = THIS_MODULE,
-+ .dai_link = snd_rpi_hifiberry_dacplushd_dai,
-+ .num_links = ARRAY_SIZE(snd_rpi_hifiberry_dacplushd_dai),
-+};
-+
-+static int snd_rpi_hifiberry_dacplushd_probe(struct platform_device *pdev)
-+{
-+ int ret = 0;
-+ static int dac_reset_done;
-+ struct device *dev = &pdev->dev;
-+ struct device_node *dev_node = dev->of_node;
-+
-+ snd_rpi_hifiberry_dacplushd.dev = &pdev->dev;
-+
-+ /* get GPIO and release DAC from RESET */
-+ if (!dac_reset_done) {
-+ reset_gpio = gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW);
-+ if (IS_ERR(reset_gpio)) {
-+ dev_err(&pdev->dev, "gpiod_get() failed\n");
-+ return -EINVAL;
-+ }
-+ dac_reset_done = 1;
-+ }
-+ if (!IS_ERR(reset_gpio))
-+ gpiod_set_value(reset_gpio, 0);
-+ msleep(1);
-+ if (!IS_ERR(reset_gpio))
-+ gpiod_set_value(reset_gpio, 1);
-+ msleep(1);
-+ if (!IS_ERR(reset_gpio))
-+ gpiod_set_value(reset_gpio, 0);
-+
-+ if (pdev->dev.of_node) {
-+ struct device_node *i2s_node;
-+ struct snd_soc_dai_link *dai;
-+
-+ dai = &snd_rpi_hifiberry_dacplushd_dai[0];
-+ i2s_node = of_parse_phandle(pdev->dev.of_node,
-+ "i2s-controller", 0);
-+
-+ if (i2s_node) {
-+ dai->cpu_dai_name = NULL;
-+ dai->cpu_of_node = i2s_node;
-+ dai->platform_name = NULL;
-+ dai->platform_of_node = i2s_node;
-+ } else {
-+ return -EPROBE_DEFER;
-+ }
-+
-+ }
-+
-+ ret = devm_snd_soc_register_card(&pdev->dev,
-+ &snd_rpi_hifiberry_dacplushd);
-+ if (ret && ret != -EPROBE_DEFER) {
-+ dev_err(&pdev->dev,
-+ "snd_soc_register_card() failed: %d\n", ret);
-+ return ret;
-+ }
-+ if (ret == -EPROBE_DEFER)
-+ return ret;
-+
-+ dev_set_drvdata(dev, &drvdata);
-+ if (dev_node == NULL) {
-+ dev_err(&pdev->dev, "Device tree node not found\n");
-+ return -ENODEV;
-+ }
-+
-+ drvdata.sclk = devm_clk_get(dev, NULL);
-+ if (IS_ERR(drvdata.sclk)) {
-+ drvdata.sclk = ERR_PTR(-ENOENT);
-+ return -ENODEV;
-+ }
-+
-+ clk_set_rate(drvdata.sclk, DEFAULT_RATE);
-+
-+ return ret;
-+}
-+
-+static int snd_rpi_hifiberry_dacplushd_remove(struct platform_device *pdev)
-+{
-+ if (IS_ERR(reset_gpio))
-+ return -EINVAL;
-+
-+ /* put DAC into RESET and release GPIO */
-+ gpiod_set_value(reset_gpio, 0);
-+ gpiod_put(reset_gpio);
-+
-+ return 0;
-+}
-+
-+static const struct of_device_id snd_rpi_hifiberry_dacplushd_of_match[] = {
-+ { .compatible = "hifiberry,hifiberry-dacplushd", },
-+ {},
-+};
-+
-+MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplushd_of_match);
-+
-+static struct platform_driver snd_rpi_hifiberry_dacplushd_driver = {
-+ .driver = {
-+ .name = "snd-rpi-hifiberry-dacplushd",
-+ .owner = THIS_MODULE,
-+ .of_match_table = snd_rpi_hifiberry_dacplushd_of_match,
-+ },
-+ .probe = snd_rpi_hifiberry_dacplushd_probe,
-+ .remove = snd_rpi_hifiberry_dacplushd_remove,
-+};
-+
-+module_platform_driver(snd_rpi_hifiberry_dacplushd_driver);
-+
-+MODULE_AUTHOR("Joerg Schambacher <joerg@i2audio.com>");
-+MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+ HD");
-+MODULE_LICENSE("GPL v2");
projects / openwrt / staging / wigyori.git / blobdiff